Imp

Imps pack potential for damage, with close-range swipes and long-range fireballs. You can easily dodge their fireball attacks if you keep mobile, even if choose to rush towards them and blast 'em. A good shotgun shot to the head will take 'em down, or a couple to the torso. Stand a few yards away and wait for them to toss a fireball. Sidestep around it and you can safely rush up with your shotgun for an easy kill.